﻿<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>JavaScript实现编码解码</title>
</head>
<body>
<script  language="javascript">
    function tt(obj,str){
        if(str==null){
            obj.value=escape(obj.value);//编码后的效果
            alert(obj.value);
        }else{
            obj.value=unescape(obj.value);//解码后的效果
            alert(obj.value);
        }
    }
</script>
<textarea name=mytxt cols=30 rows=5></textarea><br>
<input type=button value="编码" onclick=tt(document.all.mytxt)>
<input type=button value="解码" onclick=tt(document.all.mytxt,1)>
</body>
</html>